Bering INVERBOOST PX Benutzer- Und Wartungshandbuch Seite 27

Malfunction
PFC module high
temperature protection
Input power failure
Software control
exception
Current detection
circuit failure
Compressor start failure
Ambient Temperature
device failure on Driver
board
Compressor phase
failure
Four-way valve reversal
failure
EEPROM data read
malfunction
The inter-chip
communication failure
on the main control
board
Error
code
1. PFC module thermal circuit output
abnormal
2. Fan motor is abnormal or damaged
EE19
3. Fan blade is broken
4. The screw in the driver board is not tight
EE20 The supply voltage fluctuates too much
1. Compressor runs out of step
2. Wrong program
EE21
3. Impurity inside compressor causes the
unstable rotate speed
1. Voltage signal abnormal
EE22 2. Driver board is damaged
3. Main board failure
1. Main board is damaged
2. Compressor wiring error or poor contact
EE23 or unconnected
3. Liquid accumulation inside
4. Wrong phase connection for compressor
EE24 Ambient Temperature device failure
Compressors U, V, W are just connected to
EE25
one phase or two phases.
1. Four-way valve reversal failure
EE26
2. Lack of refrigerant (no detect when
TH2 or TH1 malfunction)
1. Wrong EEPROM data in the program or
failed input of EEPROM data
EE27
2. Main board failure
EE28 Main board failure
Reason
- 23 -
Solution
1. Check the main board or replace the
driver board
2. Check if the motor speed is too low
or fan motor is damaged, replace it by a
new one if any failure.
3. Change the fan blade if it is broken
4. Check the screw on driver board
Check whether the voltage is stable
1. Check the main board or change a
new one
2. Update the correct program
3. Check the refrigeration system
1. Change a new main board
2. Change a new driver board
1. Check the main board or change a
new one
2. Check the compressor wiring
according to the circuit diagram
3. Check the compressor or change a
new one
Change driver board or main board
Check the actual wiring according to the
circuit diagram
1. Switch to Cooling mode to check the
4-way valve if it has been reversed
correctly
2. Change a new 4-way valve
3. Fill with gas
1. Re-enter correct EEPROM data
2. Change a new main board
1. Stop electricity supply and restart it
2. Change a new main board